PCI: Change all drivers to use pci_device->revision
Instead of all drivers reading pci config space to get the revision
ID, they can now use the pci_device->revision member.
This exposes some issues where drivers where reading a word or a dword
for the revision number, and adding useless error-handling around the
read. Some drivers even just read it for no purpose of all.
In devices where the revision ID is being copied over and used in what
appears to be the equivalent of hotpath, I have left the copy code
and the cached copy as not to influence the driver's performance.
Compile tested with make all{yes,mod}config on x86_64 and i386.
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/ide/pci/alim15x3.c b/drivers/ide/pci/alim15x3.c
index 8a6b27b..ba0fb92b 100644
--- a/drivers/ide/pci/alim15x3.c
+++ b/drivers/ide/pci/alim15x3.c
@@ -508,7 +508,7 @@
u8 tmpbyte;
struct pci_dev *north = pci_get_slot(dev->bus, PCI_DEVFN(0,0));
- pci_read_config_byte(dev, PCI_REVISION_ID, &m5229_revision);
+ m5229_revision = dev->revision;
isa_dev = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL);
diff --git a/drivers/ide/pci/amd74xx.c b/drivers/ide/pci/amd74xx.c
index 84ed30c..8d30b99 100644
--- a/drivers/ide/pci/amd74xx.c
+++ b/drivers/ide/pci/amd74xx.c
@@ -123,8 +123,7 @@
amd_print("Driver Version: 2.13");
amd_print("South Bridge: %s", pci_name(bmide_dev));
- pci_read_config_byte(dev, PCI_REVISION_ID, &t);
- amd_print("Revision: IDE %#x", t);
+ amd_print("Revision: IDE %#x", dev->revision);
amd_print("Highest DMA rate: UDMA%s", amd_dma[fls(amd_config->udma_mask) - 1]);
amd_print("BM-DMA base: %#lx", amd_base);
@@ -312,8 +311,7 @@
*/
if (amd_config->flags & AMD_CHECK_SWDMA) {
- pci_read_config_byte(dev, PCI_REVISION_ID, &t);
- if (t <= 7)
+ if (dev->revision <= 7)
amd_config->flags |= AMD_BAD_SWDMA;
}
@@ -383,7 +381,7 @@
pci_read_config_byte(dev, PCI_REVISION_ID, &t);
printk(KERN_INFO "%s: %s (rev %02x) UDMA%s controller\n",
- amd_chipset->name, pci_name(dev), t,
+ amd_chipset->name, pci_name(dev), dev->revision,
amd_dma[fls(amd_config->udma_mask) - 1]);
/*
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
index 8631b6c..1e89dd6 100644
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -88,7 +88,6 @@
u8 reg72 = 0, reg73 = 0; /* primary */
u8 reg7a = 0, reg7b = 0; /* secondary */
u8 reg50 = 1, reg51 = 1, reg57 = 0, reg71 = 0; /* extra */
- u8 rev = 0;
p += sprintf(p, "\nController: %d\n", index);
p += sprintf(p, "PCI-%x Chipset.\n", dev->device);
@@ -103,9 +102,8 @@
(void) pci_read_config_byte(dev, UDIDETCR1, ®7b);
/* PCI0643/6 originally didn't have the primary channel enable bit */
- (void) pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
if ((dev->device == PCI_DEVICE_ID_CMD_643) ||
- (dev->device == PCI_DEVICE_ID_CMD_646 && rev < 3))
+ (dev->device == PCI_DEVICE_ID_CMD_646 && dev->revision < 3))
reg51 |= CNTRL_ENA_1ST;
p += sprintf(p, "---------------- Primary Channel "
@@ -604,14 +602,11 @@
static int __devinit init_setup_cmd646(struct pci_dev *dev, ide_pci_device_t *d)
{
- u8 rev = 0;
-
/*
* The original PCI0646 didn't have the primary channel enable bit,
* it appeared starting with PCI0646U (i.e. revision ID 3).
*/
- pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
- if (rev < 3)
+ if (dev->revision < 3)
d->enablebits[0].reg = 0;
return ide_setup_pci_device(dev, d);
diff --git a/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
index 4b6bae8..e9b07a9 100644
--- a/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -1413,11 +1413,9 @@
static int __devinit init_setup_hpt371(struct pci_dev *dev, ide_pci_device_t *d)
{
struct hpt_info *info;
- u8 rev = 0, mcr1 = 0;
+ u8 mcr1 = 0;
- pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
-
- if (rev > 1) {
+ if (dev->revision > 1) {
d->name = "HPT371N";
info = &hpt371n;
@@ -1442,11 +1440,8 @@
static int __devinit init_setup_hpt372a(struct pci_dev *dev, ide_pci_device_t *d)
{
struct hpt_info *info;
- u8 rev = 0;
- pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
-
- if (rev > 1) {
+ if (dev->revision > 1) {
d->name = "HPT372N";
info = &hpt372n;
@@ -1460,11 +1455,8 @@
static int __devinit init_setup_hpt302(struct pci_dev *dev, ide_pci_device_t *d)
{
struct hpt_info *info;
- u8 rev = 0;
- pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
-
- if (rev > 1) {
+ if (dev->revision > 1) {
d->name = "HPT302N";
info = &hpt302n;
@@ -1478,7 +1470,7 @@
static int __devinit init_setup_hpt366(struct pci_dev *dev, ide_pci_device_t *d)
{
struct pci_dev *dev2;
- u8 rev = 0;
+ u8 rev = dev->revision;
static char *chipset_names[] = { "HPT366", "HPT366", "HPT368",
"HPT370", "HPT370A", "HPT372",
"HPT372N" };
@@ -1489,8 +1481,6 @@
if (PCI_FUNC(dev->devfn) & 1)
return -ENODEV;
- pci_read_config_byte(dev, PCI_REVISION_ID, &rev);
-
switch (rev) {
case 0:
case 1:
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index 2e0b29e..1372c35 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -572,18 +572,16 @@
{
struct pci_dev *pdev = NULL;
u16 cfg;
- u8 rev;
while((pdev=pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev))!=NULL)
{
/* Look for 450NX PXB. Check for problem configurations
A PCI quirk checks bit 6 already */
- pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
pci_read_config_word(pdev, 0x41, &cfg);
/* Only on the original revision: IDE DMA can hang */
- if(rev == 0x00)
+ if (pdev->revision == 0x00)
no_piix_dma = 1;
/* On all revisions below 5 PXB bus lock must be disabled for IDE */
- else if(cfg & (1<<14) && rev < 5)
+ else if (cfg & (1<<14) && pdev->revision < 5)
no_piix_dma = 2;
}
if(no_piix_dma)
diff --git a/drivers/ide/pci/serverworks.c b/drivers/ide/pci/serverworks.c
index 1371b5b..ed04e0c 100644
--- a/drivers/ide/pci/serverworks.c
+++ b/drivers/ide/pci/serverworks.c
@@ -55,7 +55,6 @@
NULL
};
-static u8 svwks_revision = 0;
static struct pci_dev *isa_dev;
static int check_in_drive_lists (ide_drive_t *drive, const char **list)
@@ -71,9 +70,6 @@
struct pci_dev *dev = HWIF(drive)->pci_dev;
u8 mask = 0;
- if (!svwks_revision)
- pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
-
if (dev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
return 0x1f;
if (dev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
@@ -88,9 +84,9 @@
return 0;
/* Check the OSB4 DMA33 enable bit */
return ((reg & 0x00004000) == 0x00004000) ? 0x07 : 0;
- } else if (svwks_revision < SVWKS_CSB5_REVISION_NEW) {
+ } else if (dev->revision < SVWKS_CSB5_REVISION_NEW) {
return 0x07;
- } else if (svwks_revision >= SVWKS_CSB5_REVISION_NEW) {
+ } else if (dev->revision >= SVWKS_CSB5_REVISION_NEW) {
u8 btr = 0, mode;
pci_read_config_byte(dev, 0x5A, &btr);
mode = btr & 0x3;
@@ -234,9 +230,6 @@
unsigned int reg;
u8 btr;
- /* save revision id to determine DMA capability */
- pci_read_config_byte(dev, PCI_REVISION_ID, &svwks_revision);
-
/* force Master Latency Timer value to 64 PCICLKs */
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
@@ -315,7 +308,7 @@
if (!(PCI_FUNC(dev->devfn) & 1))
btr |= 0x2;
else
- btr |= (svwks_revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
+ btr |= (dev->revision >= SVWKS_CSB5_REVISION_NEW) ? 0x3 : 0x2;
pci_write_config_byte(dev, 0x5A, btr);
}
/* Setup HT1000 SouthBridge Controller - Single Channel Only */
diff --git a/drivers/ide/pci/sis5513.c b/drivers/ide/pci/sis5513.c
index f875183..756a9b6 100644
--- a/drivers/ide/pci/sis5513.c
+++ b/drivers/ide/pci/sis5513.c
@@ -659,9 +659,7 @@
/* Special case for SiS630 : 630S/ET is ATA_100a */
if (SiSHostChipInfo[i].host_id == PCI_DEVICE_ID_SI_630) {
- u8 hostrev;
- pci_read_config_byte(host, PCI_REVISION_ID, &hostrev);
- if (hostrev >= 0x30)
+ if (host->revision >= 0x30)
chipset_family = ATA_100a;
}
pci_dev_put(host);
@@ -702,7 +700,6 @@
u16 trueid;
u8 prefctl;
u8 idecfg;
- u8 sbrev;
pci_read_config_byte(dev, 0x4a, &idecfg);
pci_write_config_byte(dev, 0x4a, idecfg | 0x10);
@@ -712,11 +709,10 @@
if (trueid == 0x5517) { /* SiS 961/961B */
lpc_bridge = pci_get_slot(dev->bus, 0x10); /* Bus 0, Dev 2, Fn 0 */
- pci_read_config_byte(lpc_bridge, PCI_REVISION_ID, &sbrev);
pci_read_config_byte(dev, 0x49, &prefctl);
pci_dev_put(lpc_bridge);
- if (sbrev == 0x10 && (prefctl & 0x80)) {
+ if (lpc_bridge->revision == 0x10 && (prefctl & 0x80)) {
printk(KERN_INFO "SIS5513: SiS 961B MuTIOL IDE UDMA133 controller\n");
chipset_family = ATA_133a;
} else {
diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c
index 4878798..a7323d2 100644
--- a/drivers/ide/pci/sl82c105.c
+++ b/drivers/ide/pci/sl82c105.c
@@ -338,7 +338,6 @@
static unsigned int sl82c105_bridge_revision(struct pci_dev *dev)
{
struct pci_dev *bridge;
- u8 rev;
/*
* The bridge should be part of the same device, but function 0.
@@ -360,10 +359,9 @@
/*
* We need to find function 0's revision, not function 1
*/
- pci_read_config_byte(bridge, PCI_REVISION_ID, &rev);
pci_dev_put(bridge);
- return rev;
+ return bridge->revision;
}
/*
diff --git a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
index d21dd2e..27e92fb 100644
--- a/drivers/ide/pci/via82cxxx.c
+++ b/drivers/ide/pci/via82cxxx.c
@@ -237,16 +237,14 @@
static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
{
struct via_isa_bridge *via_config;
- u8 t;
for (via_config = via_isa_bridges; via_config->id; via_config++)
if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
!!(via_config->flags & VIA_BAD_ID),
via_config->id, NULL))) {
- pci_read_config_byte(*isa, PCI_REVISION_ID, &t);
- if (t >= via_config->rev_min &&
- t <= via_config->rev_max)
+ if ((*isa)->revision >= via_config->rev_min &&
+ (*isa)->revision <= via_config->rev_max)
break;
pci_dev_put(*isa);
}
@@ -404,10 +402,9 @@
* Print the boot message.
*/
- pci_read_config_byte(isa, PCI_REVISION_ID, &t);
printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %sDMA%s "
"controller on pci%s\n",
- via_config->name, t,
+ via_config->name, isa->revision,
via_config->udma_mask ? "U" : "MW",
via_dma[via_config->udma_mask ?
(fls(via_config->udma_mask) - 1) : 0],